<template>
  <div class="container">
    <div class="app-container">
      <!-- default-expand-all 默认展开所有节点 -->
      <!-- props设置属性 -->
      <!-- expand-on-click-node是否在点击时展开或收缩树形结构 -->
      <el-tree :expand-on-click-node="false" default-expand-all :data="depts" :props="defaultProps">
        <!-- 节点结构 -->
        <!-- v-slot="{ node, data }" 只能作用在template -->
        <!-- 作用域插槽 -->
        <template v-slot="{ data }">
          <el-row style="width:100%" align="middle">
            <el-col :span="20">{{ data.name }}</el-col>
            <el-col :span="4">
              <el-row>
                <el-col :span="12">{{ data.managerName || '暂无' }}</el-col>
                <el-col :span="12">
                  <el-dropdown @command="operateDept($event, data.id)">
                    <!-- 显示区域内容 -->
                    <span class="el-dropdown-link">
                      操作<i class="el-icon-arrow-down el-icon--right" />
                    </span>
                    <!-- 下拉菜单选项 -->
                    <el-dropdown-menu slot="dropdown">
                      <el-dropdown-item command="add">添加子部门</el-dropdown-item>
                      <el-dropdown-item command="edit">编辑部门</el-dropdown-item>
                      <el-dropdown-item command="del">删除</el-dropdown-item>
                    </el-dropdown-menu>
                  </el-dropdown>
                </el-col>
              </el-row>

              <!-- $event 实参 表示类型 -->

            </el-col>
          </el-row>
        </template>
      </el-tree>
    </div>
    <!-- 放置弹窗 -->
    <!-- 表示会接受子组件的事件  update:showDialog, 值 => 属性 -->
    <!-- ref 可以获取dom实例对象, ref也可以获取自定义的实例对象 -->
    <add-dept ref="addDept" :show-dialog.sync="showDialog" :current-node-id="currentNodeId" @updateDepartment="getDepartment" />
  </div>
</template>
<script>
import { getDepartment, delDepartment } from '@/api/department'
import { transListToTreeDate } from '@/utils'
import AddDept from './components/add-dept.vue'

export default {
  name: 'Department',
  components: { AddDept },

  data() {
    return {
      currentNodeId: null, // 存储当前点击的id
      showDialog: false,
      depts: [],
      defaultProps: {
        children: 'children', // 读取子节点的字段名称
        label: 'name' // 要显示的字段的名字
      }

    }
  },
  created() {
    this.getDepartment()
  },
  methods: {
    async getDepartment() {
      const result = await getDepartment()
      // console.log(result)
      const res = result.map(item => ({
        ...item,
        managerName: item.managerName.replace('黑马', '')

      }))
      this.depts = transListToTreeDate(res, 0)
    },
    // 操作部门方法
    operateDept(type, id) {
      // console.log(type, id)
      if (type === 'add') {
        // 添加子部门
        this.showDialog = true // 显示弹窗
        this.currentNodeId = id
      } else if (type === 'edit') {
        // 编辑部门
        this.showDialog = true // 显示弹窗
        this.currentNodeId = id // 记录id  用他获取数据
        // 更新 props 异步动作
        // 直接调用了子组件的方法  同步的方法
        // 要在子组件获取数据
        // 父组件调用子组件的方法来获取数据
        this.$nextTick(() => {
          this.$refs.addDept.getDepartmentDetail() // this.$refs.addDept 等同于子组件的this
        })
      } else {
        // 删除部门的操作
        this.$confirm('你确定要删除吗？').then(async() => {
          await delDepartment(id)
          this.$message.success('删除成功')
          this.getDepartment()
        }).catch((error) => {
          console.log(error)
        })
      }
    }
  }
}
</script>
<style scoped>
.app-container {
  padding: 30px 140px;
  font-size: 14px;
}
.tree-manager {
  width: 50px;
  display: inline-block;
  margin: 10px;
}
</style>
